I mean, I guess it depends heavily on where you live. But I've lived in Sacramento, So Cal, and Utah.
For the first two November is actually quite a bit nicer than the hotter months July-September.
And while November isn't the prettiest month along the Wasatch Front in Utah, if the snow has started falling it's great for snow sports (including snowshoeing, if you're not a slide-down-it kindof person). And if the snow hasn't fallen (and/or if you want to drive a few hours south), there's plenty of hiking to be done.